This paper describes a prototype of a conversational system that was implemented on the Ford Model U Concept Vehicle and first shown at the 2003 North American International Auto Show in Detroit. The system, including a touch screen and a speech recognizer, is used for controlling several non-critical automobile operations, such as climate, entertainment, navigation, and telephone.The prototype implements a natural language spoken dialog interface integrated with an intuitive graphical user interface, as opposed to the traditional, speech only, command-and-control interfaces deployed in some of the vehicles currently on the market.